The water pump is a weak point and is often changed with the timing belt to avoid problems. If the water pump seizes it can strip teeth off the timing belt. If the teeth strip the camshaft will get out of synchronisation with the crankshaft and the pistons and valves will meet!! However. The engine is designed with a deliberately weak rocker
Often recognized as the engine that spawned an interest in diesel tuning for thousands of European tuners, modifiers, and car fanatics, the humble VAG 1.9 PD provided a solid and highly adaptable platform for those seeking big power. The 1.9 TDI found its way into a multitude of VW Group products, including VW, Audi, Skoda, and SEAT.2006 1.9L TDI complete engine for sale. I have a good running 1.9 liter TDI engine pulled from my 2006 Jetta with 78000K. My wife ran over something in the road and put a small crack in one of the engine block mounting positions. The insurance company replaced the entire engine and i was able to keep the original engine. The crack can be welded.
I have a 1.9 which is the 102 engine and I can get from scotland to cornwall [550miles] on a full tank - well, until the light comes on which means I have ten litres left. That is with me driving at a solid 80-85mph on motorway. I think that works out about 33ish mpg. If you take it easy then it goes a lot further! Hope that helps.